Cartridge-case extractor for firearms.



II. STAI/IM.

CARTRIDGE CASE EXTRACTOR FOR FIREARMS. APPLICATION FILED MAYvzI. 1915.

1,170,014. I Patented Feb.1,1916.

" lll/11111711111 al THE COLUMBIA PLANOGRAPH co.. WASHINGTON, D. c.

entran statins VPATENT orricn.

HANS STAMM, F ST. GALLEN, SWITZERLAND, ASSIGNOR TO THE FIRM OF ADOLPH SAUBER, 0F ARBON, SWITZERLAND.

CARTRIDGE-CASE EXTRACTOR FOR FIREARIVIS.

ritorna.

Application filed May 27, 1915.

T0 all whom t may concern Be it known thatI, HANS STAMM, a citizen of the Republic of Switzerland, residing at St. Gallen, Switzerland, have invented new and useful Improvements in Cartridge-Case Extractors for Firearms;

` and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters vor figures of reference marked thereon,

which form a part of this specification.

gaging each other by means of helicalfparts' and helical grooves, while the sleeve is slipped from the front over the bolt.

In breech actions of the above specified type, the extractor has hitherto been mounted or rather embedded in the breech bolt in such a manner as to allow the breech bolt in its movement to slide over the extractor.

That method ot mounting the extractor has, however, the drawback that the breech bolt is weakened at' its front end to such a great extent that the extractor is of weak construction, and that the removal of the extractor can only be eitected with diiiiculty, that is to say, only with a great exertion of torce.

Now those drawbacks are avoided by the present invention according to which instead ot mounting the extractor in the breech bolt as hitherto, the extractorl is mounted in the breech bolt actuating sleeve and in such a manner that it is xed relatively to the breech bolt so that, although it cannot rotate, it will move longitudinallyr with the breech bolt, and will be guided along the bolt actuating sleeve in the sliding movement of the latter.

The extractor may be arranged to move in a longitudinal groove in a guide ledgeof the bolt actuating sleeve, and ,engage by means cfa lug in an annular segmentshaped groove in the breech bolt. Further Specification of Letters Patent.

Patented Feb. 1, 1916.

serial No. 30,774.

in straight-pull breech actions of the type wherein the bolt .actuating sleeve is slipped from the front over the breech bolt, the extractor may serve to limitY the forward movement of the bolt actuating sleeve when-v the breech action has been removed from the breech frame. 5

The improved method of mounting the extractor compared with the method hitherto in use, has the advantage that theextractor can be made strong enough without weakening the breech bolt, and can also be easily removed.

One form of this invention is illustrated by way of example in the accompanying drawings in which:

Figure l is a horizontal longitudinal section et a straight pull breech action of the specified type, showing the breech action in its unlocked and drawn back position in a inilitaryvritle. Fig. 2 is a side elevation ot a part ot the breech action.v Figs. 3 and 4 are sections respectively on lines A-B and C-D of Fig. 2. Fig. 5 is a front end elevation of the breech bolt. Figs. 6 and 7 are respectively a side elevation and a plan of the extractor shown separately; and Fig. 8 shows the breech action in its locked condition.

As shown, the breech action consists of the rotary breech bolt l which is provided with locking nibs 2 at its rear end, and of the bolt actuating sleeve 3, which is slipped from the front on to the bolt l and is slidable in a straight line along the latter. The sleeve 3 is provided with a handle 4 and two ,side guide ledges 5 by means of which latter the sleeve is guided in horizontal guide grooves 6 in the breech frame 7 of the rifle (Fig. 8).

The sleeve 3 engages by means of helical pieces 8 in helical grooves 9 in the boltl (Fig. l), and has sutticient play on the bolt lengthwise of the latter, when the sleeve is slid along it, to allow of imparting to the bolt by means of the helical pieces and helical grooves a quarter turn in each direction which is requisite for locking and unlocking the breech action. i In these latter operations the locking nibs 2, of the breech bolt enter or leave recesses (not shown) which are Jformed in the rear part ot the breech trame, and which communicate with the guide grooves 6., In the locked condition ot the breech action the nibs 2 lie in a vertical plane (Fig.l S) whereas'in its 'unlocked"con dition, the nibs 2 lie in a horizontal plane (Fig. i).

The extractor 10 (Figs. Gand 7) ismounted on the outer side in the right hand guide ledge 5 cf the sleeve 3 (Figs. 1 and 8) it is guided by means of its rear portion (of dovetail shape in cross section) in a correspondingly shaped guide groove 5 in the said ledge (Fig. 3). It is fixed against longitudinal movement relatively to the bolt 1, inasmuch as it engages by means of a lug 11 in an annular segmentalgroove 12 in'the bolt (Figs. 1 and 1). This groove is so dimensioned that the bolt 1 is free to make a quarter turn in each direction in the locking and unlocking operations, the extractor v4l() sliding in the guide Ygroove 5 in the sleeve. 'Ihe extractor therefore shares the longitudinal movements of the bolt during the pulling back and pushing forward of the breech action in the loading operation.

'Ihe sleeve 3 has in its front part a notch 3 for the forward broader end of the extractor which carries the-.extracting claw 13. VT his claw projects beyond the Yforward end of the breech bolt, and when a cartridge is pushed into the cartridge chamber, it

springs out Vin the usual manner and en-y gages the rim of the cartridge (Fig. 8). IVhen the breech action is pulled back, the empty cartridge case is .extracted by the extractor. rIhe extractor has a thinner central portion 10 which allows theforward portion of the extractor to spring out.

IVhen it is desired to remove the extractor itsforward portion is sprung outward until `thelug llhas moved out of the groove 12;

then the extractor is drawn out of the groove 5 in the sleeve, and then the sleeve itself can be slipped forwardly off the bolt.

Having now particularly described and ascertained the nature of my said lnvention and 1n what manner the same 1s to be per `formed,I declare that what I claim is:

bolt, a cartridge case extractor mounted at the outside of a guide ledge of the sleeve Vand having a fixed longitudinal position relatively to the breech bolt but not rotating therewith, said extractor being guided along the boltactuating sleeve by the sliding movement of the latter, the front end ofthe extractor forming a stop to prevent the sleeve from falling oif when the breech action has been removed from the Lbreech frame.

2. In a Astraight-pull breech action for rifles, a rotatable .breech bolt provided with locki1ig'nibs,a breeehbolt 'actuating sleeve slidable longitudinally on the said bolt and 'guided in the breech frame .by meansof Vactuating sleeve in said `groove by the sliding movement of the sleeve.

3. In a straight-pull breech action for rifles, a rotatable breech bolt provided with locking nibs, a breech bolt actuating sleeve slidable longitudinally on said bolt and guided in the breech frame by means of lateral guide ledges, said bolt and sleeve engaging each other bymeans of correspond ing helical parts, the sleeve being slipped from the `front over the bolt, a cartridge case extractor slidable ina dove-tail longitudinal groove at the outside of one of said lateral guide ledges of the sleeve and engaging by means of a lug on its front end into an annular segmental groove in the breech bolt, said extractor having a fixed longitudinal position relatively to the breech bolt but not rotating therewith, and guided along the bolt 'actuating sleeve in the longitudinal groove by the sliding movement of the sleeve.

1. In a straight-pull breech action for rides, a rotatable breech bolt provided with locking nibs, a breech bolt actuating sleeve slidable longitudinally on said bolt and guided in the breech frame by means ofy lateral guide ledges, Vsaid breech bolt and sleeve engaging each other by corresponding'helical parts, the sleeve being slipped from the front over the bolt, a cartridge case extractor slidable in a longitudinal groove at the outside of one of said lateral movement of the sleeve, and means to limit the forward movement of the bolt actuating sleeve when the breech action has been removed from the breech frame.

5. In a straight-pull breech action of rifles. a rotatable breech bolt provided with locking nibs, a breech bolt actuating sleeve slidable longitudinally on said bolt and guided in the breech frame by 'means 'of lateral guide lcxlges.l said bolt and sleeve engaging each other by corresponding helical parts, the sleeve being slipped from the front over the bolt, a cartridge case extractor slidable in a longitudinal groove at the outside of one of said lateral guide ledges of the sleeve and a lug on its front end engaging an annular segmental groove in the breech bolt, said extractor having a iXed longitudinal position relatively to the breech bolt, but not rotating therewith, and being guided along the bolt actuating sleeve in said longitudinal groove by the sliding movement of the sleeve, the

front portion of the extractor carrying the lug serving as a stop for limiting the forward movement of the bolt actuating sleeve When the breech action has been removed from the breech frame.

In testimony that I claim the foregoing as my invention7 I have signed my name in presence of tivo subscribing Witnesses.

HANS STAMM.

Witnesses:

FRANK DIMMKE, EMIL MEILE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

